Conversion of THC to CBD

Hash and Stuff Pre/Post-Processing
1

Anyone have links/info for the selective ring opening of THC to yield CBD?

2

I know it’s been discussed here, check search

3

I wasn’t able to find the other thread, though I remember one.

This happened though:
https://www.instagram.com/p/B3OB78dBGwS/?igshid=1ng4475rqlse5